Cmmg 22lr conversion kit shooting 3 round bursts.

CK_32

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Jan 22, 2010
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So I've had a cmmg 22lr kit for about 6 months. It's now starting to do 3 round bursts every now and again. This is the SS kit for an AR 15. About 1500 rounds in so far.

Now before you go blaming my LPK I just switched out the lower with a buddies with a totally differant LPK (he has RRA I have DPMS) and it did it twice with his.

So it's definantly the kit. Can someone please tell me how to fix this. I love this thing but don't want to have to scrap it due to AW. I've heard this is common with CMMG kits.


It's sitting in a BCM midlength BFH upper on a mega lower with a DPMS LPK.


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Re: Cmmg 22lr conversion kit shooting 3 round bursts.

Also idk how but this all started after I got my bcm middy. It shot about 1k rounds through the carbine (bcm m4 upper) I had but as soon as I sold it off and got this midlength it all started. Do you think it has something to do with the gas length being too long for the 22lr?

Other than the upper everything is the same as the m4 set up I had with no problems.
 
Re: Cmmg 22lr conversion kit shooting 3 round bursts.

I havnt taken the kit appart and there is no wear marks on anything or missing pieces or anything. So I'm trying to figure out what is causing this. I emailed cmmg about the problem to see if they know what could be causing this due to them making the dam thing.
 
Re: Cmmg 22lr conversion kit shooting 3 round bursts.

Don't risk the jail time. Call cmmg, I bet they'll replace for free.

Btw 22lr conversion kits are not gas operated so your gas tube length has nothing to do with it.
 
Re: Cmmg 22lr conversion kit shooting 3 round bursts.

In fact depending on what ammo you use in the kit, you may want to fire a few .223's through the gun after shooting .22's to clear the gas system. I have the dedicated .22 upper, and it does not even have a gas tube.